Link saw



C. WOLF LINK SAW Feb, 17, 1925.

Filed April 27, 1921 Patented Feb. 17, 1925.

Aina'rall'r OFFICE.

CHARLES WOLF, 0F IYORTLAND, OBIVEGN.

LINK SAW.

Application mea apru 27, 1921. serial No. 464,876.

To all whom it may concern.

Be it hereby known that I Cnanms WOLF, a citizen of the United tates. and resident of Portland, in the county of Multnomah and State of Ore ou, have invented a certain new and usefu Improvement in y Link Saws, such as are more fully set forth Figure 1 is a side elevation of a sprocketwith a portion of the chain passing around same. Figure 2 is a front elevation of Fig. 1, and also a partial section along the line 2 2 in Fig. 1. v Y

Similar numbers of` reference refer to the same or similar parts throughout the several views.

Referring in detail to the drawing, it will Vbe observed that I have constructed a grooved sprocket member 10 having mounted in its groove 11 a plurality of rollers 12 carried by the pins 13. Openings 14:y starting near the center ofthe sprocket open into the groove 11 leaving only the spokes 15 to support the sprocket portion of the wheel. The face 16 at the end yof each spoke has a function which will be explained later.

It will be seenthat between the rollers 12 are the drag links17 having a drag tooth 18 at each end, and pin-'holes below and between the points ofthe drag teeth 18.

This series of drag links is' united toether by`means of pairs of cutting links 22. Each link of each pair of cutting links has a cutting tooth 23formed on one end'opposite to that of the tooth carried by its mate. It must be carefully observed that these cutting links always engage the wood itt 1points between the two teeth of a drag It will readily be seen by inspection fof Fig. 1, which illustrates the manner in which the rollers support the chain, that by the use of this t pe of sprocket a chain isquite' incapable o canting and thereb inflicting the extreme wear upon the sprocket and the teeth formed at each end of each blok groove of the sawv frame around which the chain passes.

The cutting links 22 ride upon the rollers 12, whereas `the drag links 17 ride upon the curved faces 16 of the spokes 15. It follows that the angular pull between the links is much less than would be the case where the pitch of the chain was equal to the circular dista-nce between the rollers.

It will be understod that when a solid sprocketis used that sawdust accumulates between the vsprocket and chain and soon renders the device inoperative. By my construction the sprocket becomes a fan which blows the saw parts.

While I have thus illustrated and described my invention itis not my desire to limit myself to this precise form or method of application, but intend that it shall cover all forms and modifications that fall fairly within the appended claims.

v What I claim is:

1. The combination of a sprocket wheel consisting of a central hub having radiating spokes and having the periphery of the wheel ooved to form opposing side plates extendmg to the openings between the spokes, and having one chain-carrying roller mounted between said plates outside of and between each pair of said spokes; with a block chain having projectinr block links which ride upon the endso said spokes, and whose side links ride upon said rollers outside of the line of pull of said chain in a manner to reduce the angular pull between the links of said chain and to reduce 'the canting effect.

2. The combination of a sprocket wheel consisting of a central hub' having radiating spokes and having the periphery of the wheel grooved to form opposing side plates extending to the openings between the spokes and having one chain-carrying roller mounted between said side lates midway between said spokes; with a b ook chain havinvI digg l. outside of their connecting pins, each of said block links having a projecting base which can rest upon the end of a spoke; and pairs of side links bearing cutting teeth and connecting said block links, said side links having vrecessed edges which ride upon said rollers outside of the line joining the pins in said side links. Y

CHARLES WOLF.

dust away from the working l 

